History NightmareFuel / Gate

* Imagine a Gate opens to another world and you send a considerable army across and learn days later they were not only in retreat, but '''[[CurbStompBattle wiped out]]''' by an unknown force. At that point, you'd wonder [[TechnologicallyAdvancedFoe just what the hell the people on the other side of the Gate have that you don't]]. And just to make things worse, they ''come after you''. You amass the biggest army you can muster, numbering in the hundreds of thousands... and they get ''slaughtered'' before they can even get close to the enemy camp, all with weaponry far beyond your understanding that renders your battle tactics ''worthless''.

** Later in the battle, Dulan has found a way to go and fight them: sneak upon the enemy in the night, with the new moon meaning there will be little light for them to be detected and slaughtered at distance. They do that... And then, suddenly, the sky is lit orange by ''something'' falling from the sky. [[OhCrap Dulan has barely the time to realize the enemy can see in the dark]] and ordering a desperate charge to at least ''try'' and bring the fight to the enemy before the slaughter resumes... And then his charge against the enemy positions is stopped by barbed wire disabling his horse, and the troopers that came to his rescue are casually killed through their armor and shields by machine guns, that he hadn't seen yet. No wonder that, when the mortar shells starts falling, he's LaughingMad...
** Bit of FridgeHorror here, but when Itami selected prisoners to be taken back to Alnus, he selected the female prisoners. We, the audience, are aware that it's to keep them from being raped by their captors. However, the female prisoners likely weren't immediately aware of that fact. They'd just seen their forces cut down by an overwhelmingly superior force, and now were being requested as prisoners by the leader of that force. Since rape and pillage seem to be standard practice in the world beyond the Gate, what must have been going through their heads before they reached Alnus and learned the truth?
* The fire dragon attack on the elf village. A village inhabited by men, women, and children and the fire dragon roasts the place indiscriminately as it searches for a snack.

* The speed and casualness of any of Rory's slaughters, [[PutTheLaughterInSlaughter as she laughs the whole time]].

* The Akusho district, the slums of the Imperial capital. The slave market is open to the public, the butcher has some mystery meat with hands sticking out of it, drug use seems to be rampant, and so is prostitution. Oh, and criminal bosses work here with assassins not afraid to cut up their victims and leave them lying in the streets, be it men, women or children. A CrapsackWorld packed into a part of a capital city.
* The Special Region experiencing an earthquake for the first time. To them it was considered the end of the world.

* Crosses over with Tear Jerker, but the way that Yao describes how easy it was to do what she did to Tuka... she starts off with a SlasherSmile as she talks about how easy it was for Itami to be manipulated, but the more she explains about exactly what the Fire Dragon did to her village, she starts breaking down, never losing the smile as she cries. She's just so ''broken'' and all of a sudden, we get to see how far she's willing to go in the name of saving her people...

* The fates of any apostle that's been captured by their enemies. It's not pretty at all.

* Youji, Yao, and Rory facing a horde female [[PlagueZombie Plague Zombies]]. Don't let the "normal" look fool you....

* Mixed with ParanoiaFuel in Episode 24 for Zorzal. Since his ego couldn't bear the thought that ''anyone'' is better than him, not even Rory, [[PhysicalGod an apostle,]] and challenged Itami directly, Itami put him in his place. In the novel, he grabbed a goblet out of Tyuule's hand, put it in Zorzal's, and called out the callsign of the sniper team observing the confrontation, giving them the command to shoot the goblet in Zorzal's hand. In Episode 24, the sniper team acts on their own when Zorzal tries to attack Itami, with a sniper bullet hitting the floor next to him. In both cases, Itami tells Zorzal outright that if he didn't let Piña go, and promise to stop sending assassins after Lelei, the next bullet would go in his head. To say that Zorzal did not take it well, is a serious understatement; just one part of his breakdown is the mere thought of an instantaneous death he can't see coming as he starts imagining gunshots in his retreat, screaming at sounds that aren't even happening.

* Volume 8. Leilei participates in a "Gate Opening" experiment to try and open a gate of her own. The end results culminates in Itami and every single member of the Japanese staff supervising the experiment freaking out completely and pleading her to close her gate immediately while putting the entire building under lockdown and ordering its complete destruction if communication remains broken for 24-hours, all to the complete confusion of the Special Region inhabitants present. The reason? Judging from Itami´s description after returning from a quick trip through her gate, she accidentally opened a straight path to a ''[[{{Franchise/Alien}} Xenomorph]]'' nest!
* Volume 8. Zorzal outlines to Tyuule exactly why the JSDF absolutely ''cannot lose'' the fight with him. Not only does he break his word regarding the treatment of captured enemy citizens, he leaves evidence of his wrong doing in places where it can easily be found by his victims, hoping to enrage them so he can have the pleasure of beating them down, but should that fail to have the desired effect, ''that's when he gets nasty.''
* The Arachnids. Hardy eventually reveals that keeping the Gate open allows "interdimensional parasites" to enter Alnus. That alone is terrifying, but it gets worse. In order to keep the invaders from overrunning both worlds, Lelei ''shuts the Gate.'' Think about the implications of that: Alnus, and by extension Japan, had revolutionized the economy and brought the single most powerful military force in the Special Area to the ground. Now, a modern force of soldiers is trapped with equipment that might as well be useless. Napoleon said it best, "An army marches on it's stomach." Now, that army has no way to feed.

* Imagine a Gate to another world opens suddenly, and then, without warning or provocation, an army of fantastic monsters come spilling out of it. You, an unarmed civilian, find yourself facing down this formidable force [[FateWorseThanDeath and capture could mean being]] made into a SexSlave if you're female, or a one-way trip to the mines as a slave if you're make. The attackers also indiscriminately kill people left and right, ultimately murdering at ''least'' several hundred Japanese civilians.